Electric controller.



PATENTED JULY 14, 1903.

A.SUNDH. ELECTRIC CONTROLLER.

APPLICATION FILED MAR. 16, 1903.

3 SHEETS-SHEET 1.

N0 MODEL.

DIN'I'DINDIRDIN mum ATTORNEY PATENTED JULY 14, 1903.

A. SUNDH. ELECTRIC CONTROLLER.

APPLICATION FILED MAR. 16, 1903.

3 SHEETS-SHEET 2- N0 MODEL.

No, 733,567. PATENTED JULY 14, 1903..

A. SUNDH. ELECTRIC CONTROLLER. APPLICATION FILED MAR. 16. 1903.

3 SHEETS-SHEET 3..

N0 MODEL.

n I llillL! E -'L----- u ATTORNEY UNITED STATES Patented July 14, 1903. I

AUGUST 'SUNDH, OF YONKERS, NEWV YORK.

ELECTRIC CONTROLLER.

SPECIFICATION forming part of Letters Patent No. 733,567, dated July 14, 1903.

Application filed March 16,1908. Serial No.148,065. (No model.)

To (LZZ whom it ntrty concern.-

' tric Controllers, of which the following is a specification.

The invention relates to a device for automatically controlling electric translating apparatus, and more especially an electric motor. It is adapted for use with pumps which are to be controlled in accordance with the rise and'fall of the pumped fiuid.

The object of the invention is to operate such a device through the minimum of electric energy, to control the changes in the circuit gradually, and to render the said device more compact and economical in form.

The invention consists, broadly, in means for producing two electromagnetic fields, an armature movably supported in one of said fields and actuated thereby to move into the other field, and means controlled by said armature for neutralizing its actuating-field upon said armature becoming subject to the holding control of the field into which it has been moved; in the construction whereby the controlling-armature is held in position corresponding to the running of the motor with a very small expenditure of energy; in the construction whereby a controlling-solenoid acts first quickly to close the main operating-circuit and then more slowly to accomplish the circuit changes for proper starting of the m0- tor, and also in the details more particularly pointed out.

In the accompanying drawings, Figure 1 is a front view of a preferred form of solenoid and associated parts used in my invention. Fig. 2 is a horizontal sectional View of the same on the plane Ct Ct of Fig. 1. Fig. 3 is a vertical median section of the device shown in Fig. 1. Fig. 4 is a side View of the same. Fig. 5 is a vertical section of the preferred construction of stationary sliding contacts at the side of my preferred solenoid device. Fig. 6 is a rear view of the same separated from its support on the side of the solenoid, and Fig. 7 is a diagrammatic illustration of one arrangement of circuits appropriately employed in connection with said invention.

Similar numbers of reference indicate like parts.

through an aperture 14 in the frame, of somewhat greater diameter than said stem. (See Fig. 3.) Upon the top of the stem 13 is mounted the 'bridgingterminal 15, which when the core 12 is raised makes contact with the two fixed terminals 16 and 17 for closing the main circuit through the main solenoid 2, as hereinafter described.

On the top of the core 12 there is an annular washer 18, of soft material, such as felt or rubber, which closely fits the stem 13. When the core 12 is raised, as shown in Fig. 3, this washer closes the annular space 14 between the stem 13 and the aperture through which it passes. Then the coil 1 is energized, the escape of air through space 14 permits the core 12 quickly to rise and close circuit at 16 17; but when said core closes space 14 the air confined in the interior of the solenoid below it acts to retard the motion of the lower core 19, when said core is moved by its surrounding coil-2. This core 19 directly actuates the circuit-changing parts of the device. At its lower end it carries a metallic cross-piece 20, insulated at 21. In its lowermost position the core 19 rests upon the cushion 22, supported in a bracket, as shown. The object of said cushion is to diminish the shock when the core 19 drops.

At each end of the cross-piece 20 are pivoted two parallel levers, of metal, each provided with a spring 23, tending to push it forward against an adjustable stop 24:. These levers are shown at 25, 26, 27, and 28. The levers 27and 28 on one side carry contactpieces which are adapted to bear'on the stationary terminals 29 to 36. These are carried by insulation 37, Fig. 1, of dovetail form,

,let into a rabbeted cavity in the frame 10 and .held in place by the screw 38.

In a similar cavity on the opposite side of the frame 10 are two parallel metallic terminals 39 and 40, separated by an insulatingpartition 41. These are held in place by the screws 42. The terminal is cut off at 43, (see Fig. 1,) so that as the levers 25 and 26 move upward contact is broken at the shoulder 43 between lever 26 and terminal 40 before it is broken between the lever 25 and terminal 39. The circuit connections with terminals 29 and 40 pass through opening 44 in slab 3. The insulated conductor 45 reaches terminal 40 through an opening in terminal 39, Fig. 6.

'As shown in section in Fig. 5 and in top view in Fig. 2, the contact carried by the lever 25 travels in a groove in terminal 39.

This prevents any tendency of the core 19' and its associated parts to revolve about the axis of said core.

Fig. 7 illustrates in diagram the application of my device to the control of an electric motor.

At 45 is exemplified any form of automatic primary circuit-closing switch, such as a floatactuated switch, which opens on the rise of the float 46 and is closed when the level of the fluid supporting said float sufiiciently descends. Entering at 47 the current proceeds to bindingpost 49, by wires 50 through the switch 45 to terminal 51, thence through the solenoid-coil 1, and out by wire 52 to the main wire48. (See arrows A.) Core 12 being raised, electric connection between terminals 16 and 17 is established through 15. The following circuits are then established: A part of the current proceeds from 49 by the wire 53 to 54, where it branches, part passing through the shunt field-magnet coil 55 and by wire 56 to terminals 16, bridge 15,terminal l7, and out at 48, and part to the armature 57, (see arrows 13,) and after traversing said armature the current again branches, one part taking the wire 58 and the other the series field-magnet 59. The wire 58 (see arrows 0) leads to terminal 60 and thence to the terminal 36. The branch current which passes through the field-magnet 59 proceeds by the wire 61 (see arrows D) to terminal 62 and thence through the resistance 7 between terminals 29 to 35, through levers 27 28, cross-bar 20, and levers 25 26 to terminals 39 40 and out by wire 63, terminal 16, bridge 15, terminal 17 to main 48. The motor thus starts up with all the resistances in series with the armature and series field-magnet. At the same time another branch of the current through the terminal 49 traverses the coil 2, terminals 39 40, and wire 63 to reach the terminals 16 and 17 and main 48. This energizes the solenoid 2, which lifts its core 19, with the attached parts. The speed of movement of the core 19 may be regulated by plug 44 and is preferably quite slow, so that the levers 27 28 rise slowly along the terminals 29 to 35, gradually cutting resist-ances out of the armature circuit and speeding up the motor until finally said terminals rest upon the fixed terminal 36, when the series field-magnet 59 is entirely out out and the current traversing the armature takes the wire 58 in returning to the main 48. At the same time the terminal carried at the end of the lever 26 runs off of the fixed terminal 40, thus interrupting the circuit through the solenoid-core 2 by disconnecting the terminals 39 and 40. The core 19 having now reached its highest position through the inductive action of the field of core 2 comes into the holding-contact of the field of coil 1. Hence although the energizing-circuit of core 2 is broken the core 19 does not fall, but is retained in elevated position by coil 1 until circuit is broken by the extraneously-controlled circuitcloser at 45. When this last-named change occurs, the core 19 falls back to the position shown in Figs. 1 and 3, being received by the cushion 22, and the motor-circuit is opened, and as both the cores 12 and 19 fall together the opening of the annular opening 14 permits free inlet of air, so that they descend rapidly.

I clai1n- 1. Meansforproducingtwoelectromagnetic fields, an armature movably supported in one of said fields and actuated thereby to move into the other field, means controlled by said armature for neutralizing its actuating-field upon its becomingsubject to the holding control of the field into which it has become moved, and means independent of said armature for automatically neutralizing said holding-field and thereby releasing said armature.

2. Two circuit-closers each having a controlling-electromagnet, one circuit-closer being constructed to close circuit through the magnet-coil of the other, an armature for said coil constructed to be moved thereby into the magnetic field of the coil of the first circuitcloser and to be retained in position by said field and means governed by said armature when so moved for denergizing its actuating-coil.

3. Two circuit-closers each having a controlling-electromagnet, one circuit-closer being constructed to close circuit through the magnet-coil of the other, an armature for said coil constructed to be moved thereby into the magnetic field of the coil of the first circuitcloser and to be retained in position by said field, means governed by said armature when so moved for deenergizing its actuating-coil, and means independently and automatically controlled for releasing said armature from the attraction of said field.

4. In combination with an electric translating device, two circuit-closers each having a contr01ling-electromagnet,one circuit-closer being constructed to close circuit through the magnet-coil of the other, an armature for said coil constructed to be moved thereby into the magnetic field of the coil of the first circuitcloser and to be retained in position by said field, means for varying the strength of current in said translating device controlled by IIO said armature during its said movement and means governed by said armature when so moved for deenergizing its actuating-coil.

5. A primary solenoid coil and core, a second solenoid coil and core in line therewith, means operated by the primary 'core to close circuit through the second coil and means operated by the second core for breaking said circuit when said second core has been raised into the holding contact of the field of said primary coil.

6. In combination with a com pound-wound motor, a solenoid and core, a rheostat in circuit with said motor operated by-said core, means for maintaining said corein the position into which it is drawn by the energized solenoid and means actuated by said core when in its said position for breaking the circuit in said solenoid and for cutting out the series coils of said motor.

7. In combination with an electric motor, avsolenoid, resistance-terminals on one side thereof, terminals for maintaining the solenoid-circuit on the opposite side thereof, a solenoid-core and means operated by said core and cooperating with said opposite terminals beside the solenoid for controlling the motor and the solenoid-circuit.

8. The combination with circuit connections of a series of resistances having interposed fixed contacts, an elongated fixed contact, a movable bridge-piece constructed to travel over said resistance-contacts and said elongated contact, means for actuating said bridge-piece, means for neutralizing said actuating means when said bridge-piece reaches a predetermined point in its path of movement, and means for retaining said bridgepiece in said position.

9. The combination with circuit connections of a series of resistances having interposed fixed contacts, an elongated fixed contact, a movable bridge-piece constructed to travel over said resistance-contacts and said elongated contact, an electromagnet, an armature therefor connected to and actuating said bridge-piece and means for deenergizing said magnet when said bridge-piece reaches a predetermined point in its path of movement.

10. The combination with circuit connections of a series of resistances having interposed fixed contacts, an elongated fixed contact, a movable bridge-piece constructed to travel over said resistance-contacts and said elongated contact, an electromagnet, an armature therefor connected to and actuating said bridge-piece, means for denergizing said magnet when said bridge-piece reaches a predetermined point in its path of movement, and means for retaining said bridgepiece in said position.

11. The combination with circuit connections of a series of resistances having inter posed fixed contacts, an elongated fixed contact, a movable bridge-piece constructed to travel over said resistance-contactsand said elongated contact, two electromagnets for controlling said bridge-piece, and means for denergizing one of said magnet-s when said bridge-piece reaches a predetermined point in its path of movement; one of said magnets operating'to move said bridge-piece as aforesaid, and the other, after the first has been deenergized, retaining said bridge-piece in said position.

12. The combination in circuit of a series of resistances and interposed fixed contacts, two parallel elongated fixed contacts, one shorter than the other, a movable bridgepiece constructed to travel over said resistance-contacts and said elongated contacts and an electromagnet for actuating said bridgepiece, the said magnet-core being in circuit with said shorter fixed. elongated contact and said bridge-piece; whereby when said bridgepiece moves beyond said shorter contact, circuit in said magnet-coil is broken.

13. In combination witha compound-wound electric motor, a series of resistances and interposed fixed contacts, two parallel elongated fixed contacts one shorter than the other, a cut-out terminal for the series coil of said motor, a movable bridge-piece constructed to travel over said resistance-contacts and said elongated contacts and to meet said cut-out terminal, and circuit connections; wherebysaid bridge-piece firstis caused to run olf said shorter elongated contact at the same time that it leaves said resistancecontacts and then to meet said cut-out terminal, thereby cutting out the series coil of said motor.

14. Two solenoids in line, a head closing the internal chamber in said solenoids at one end thereof and provided with an air-aperture, two cores within said chamber and means for causing said cores to be moved successively by their respective solenoids; whereby the first core moves to close said air-aperture and the second core moves against the resistance of the air confined in said chamber 15. Two solenoids in line, a head closing the internal chamber in said solenoids at one end thereof and provided with an air-aperture, two cores within said chamber and means for causing said cores to be moved successively by their respective solenoids; whereby the first core moves to close said air-aperture and the second core moves against the resistance of the air confined in said chamber; and means for varying the resistance of said confined air.

16. Two solenoids in line, a head closing the internal chamber in said solenoids at one end thereof and provided with an air-aperture, two cores within said chamber and means for causing said cores to be moved in the same direction successively by their respective solenoids; whereby the first core moves to close said air-aperture and the second core moves against the resistance of the air confined in said chamber; and an airvalve between said cores communicating with said internal chamber.

17. The combination of a solenoid, a core adapted to be operated thereby, a movable terminal carried by said core and a long fixed terminal against Which said movable terminal is adapted to slide when said core is operated, said movable terminal being set into a longitudinal groove in said fixed terminal to prevent rotation of said core.

18. The combination of a solenoid, a frame therefor, a rabbeted cavity in said frame, insulation fitting said cavity, a metallic terminal held in said insulation; said terminal and AUGUST SUNDI-I.

Witnesses:

I. A. VAN WART, WM. H. SIEGMAN. 

